JP2547383Y2 - Hollow valves for internal combustion engines - Google Patents
Hollow valves for internal combustion enginesInfo
- Publication number
- JP2547383Y2 JP2547383Y2 JP1990120341U JP12034190U JP2547383Y2 JP 2547383 Y2 JP2547383 Y2 JP 2547383Y2 JP 1990120341 U JP1990120341 U JP 1990120341U JP 12034190 U JP12034190 U JP 12034190U JP 2547383 Y2 JP2547383 Y2 JP 2547383Y2
- Authority
- JP
- Japan
- Prior art keywords
- hollow
- valve
- receiving surface
- central axis
- umbrella portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Lift Valve (AREA)
- Powder Metallurgy (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、内燃機関の吸排気弁として使用される中空
弁に係り、特に、冷却性能を向上させた中空弁に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hollow valve used as an intake / exhaust valve of an internal combustion engine, and particularly to a hollow valve having improved cooling performance.
傘部とステムを連設した弁の中心軸線に沿って、傘部
からステムの適所までに亘る中空孔を設けた中空弁は、
弁体を軽量化させ、動弁系の慣性質量を軽減させる上に
おいて非常に有利である。A hollow valve provided with a hollow hole extending from the umbrella portion to an appropriate position of the stem along the central axis of the valve connecting the umbrella portion and the stem,
This is very advantageous in reducing the weight of the valve body and reducing the inertial mass of the valve train.
この種の中空弁には、中空孔内に、冷却用流体、例え
ば金属ナトリウムを封入して、傘部の冷却性能を向上さ
せたものがある。In this type of hollow valve, there is one in which a cooling fluid, for example, metallic sodium is sealed in a hollow hole to improve the cooling performance of an umbrella portion.
このような冷却用流体を封入してなる中空弁において
は、例えば特開昭59−108811号公報や実開昭62−102806
号公報に見られるように、中空孔を、傘部においてラッ
パ状に拡径させて、冷却用流体との接触面積が大きくな
るようにするのが通例である。In a hollow valve in which such a cooling fluid is filled, for example, Japanese Patent Application Laid-Open No. 59-108811 and Japanese Utility Model Application Laid-Open No. 62-102806
As seen in the publication, it is customary to enlarge the diameter of the hollow hole in a trumpet shape at the umbrella portion so as to increase the contact area with the cooling fluid.
上記した従来の中空弁は、冷却用流体の弁体に対する
接触面積が大きく、かつ作動に伴って、冷却用流体が強
く撹拌されるほど、冷却用流体に対する熱の伝達効率が
高まって、弁体の冷却性能は向上するが、従来のもので
は、冷却用流体を中空孔内において強く撹拌させるため
の格別の工夫は施されていない。In the above-described conventional hollow valve, as the contact area of the cooling fluid with the valve body is large, and the cooling fluid is strongly stirred with the operation, the efficiency of heat transfer to the cooling fluid increases, Although the cooling performance of the prior art is improved, the conventional one does not take any special measures to strongly agitate the cooling fluid in the hollow hole.
また、弁体の冷却効果を大とするために、中空孔の内
面と冷却用流体との接触面積をできるだけ大きくするこ
とが望ましいが、そのために中空孔を一定限度以上に大
きくすると、傘部の肉厚が薄くなって、強度的に耐えら
れなくなる。In addition, in order to increase the cooling effect of the valve body, it is desirable to increase the contact area between the inner surface of the hollow hole and the cooling fluid as much as possible. The wall thickness becomes thin and the strength cannot be endured.
その結果、従来の中空弁においては、弁体の冷却性能
の向上には、自ずと限界があった。As a result, in the conventional hollow valve, there was naturally a limit in improving the cooling performance of the valve body.
本考案は、上記課題に鑑みてなされたもので、その目
的とするところは、傘部の中空孔における冷却用流体と
の接触面積を大とすることにより、弁体の冷却性能をよ
り一層向上しうるようにするとともに、冷却用流体を効
果的に撹拌しうるようにした、内燃機関用中空弁を提供
することにある。The present invention has been made in view of the above-mentioned problem, and an object thereof is to further improve the cooling performance of the valve body by increasing the contact area of the hollow hole of the umbrella portion with the cooling fluid. It is an object of the present invention to provide a hollow valve for an internal combustion engine, wherein the cooling fluid can be effectively stirred.
本考案によると、上記目的は、次のようにして達成さ
れる。According to the present invention, the above object is achieved as follows.
（１）傘部とステムを連設した弁の中心軸線に沿って、
傘部からステムの適所までに亘る中空孔を設け、この中
空孔内に、冷却用流体を封入してなる内燃機関用中空弁
において、前記傘部内における中空孔の内側面に、傘部
の前面に向って順次大径となるとともに、前記中心軸線
に対して直角をなす受止面と、この受止面の外周縁から
前記中心軸線と平行に延びる案内面とからなる階段状の
多数の凹凸部を設けることにより、中空弁の上下運動に
伴い、その内部に封入されている冷却用流体が、前記凹
凸部における案内面に案内されて、前記中心軸線の方向
に往復運動させられるとともに、前記受止面に衝突して
撹拌されるようにする。(1) Along the central axis of the valve connecting the umbrella and the stem,
A hollow hole extending from the umbrella portion to an appropriate position of the stem is provided, and a cooling fluid is sealed in the hollow hole. In the hollow valve for an internal combustion engine, an inner surface of the hollow hole in the umbrella portion has a front surface of the umbrella portion. A large number of step-like projections and depressions, each having a diameter gradually increasing toward the center axis, and a guide surface extending perpendicularly to the center axis and a guide surface extending in parallel with the center axis from the outer peripheral edge of the reception surface. By providing the portion, along with the vertical movement of the hollow valve, the cooling fluid sealed therein is guided by the guide surface in the uneven portion, and reciprocated in the direction of the central axis, It is to be agitated by colliding with the receiving surface.
（２）傘部とステムを連設した弁の中心軸線に沿って、
傘部からステムの適所までに亘る中空孔を設け、この中
空孔内に、冷却用流体を封入してなる内燃機関用中空弁
において、前記傘部内における中空孔の内側面に、傘部
の前面に向って順次大径となるとともに、前記中心軸線
に対して遠心方向に傘部の後方へ向って大きく傾斜する
受止面と、この受止面の外周縁から、求心方向に前方へ
向って、受止面の傾斜角度よりも小さな傾斜角度で傾斜
する案内面とからなる鋸歯状の多数の凹凸部を設けるこ
とにより、中空弁の上下運動に伴い、その内部に封入さ
れている冷却用流体が、前記凹凸部における案内面に案
内されて、前記中心軸線の方向に往復運動させられると
ともに、前記受止面に衝突して撹拌されるようにする。(2) Along the central axis of the valve that connects the umbrella and the stem,
A hollow hole extending from the umbrella portion to a proper position of the stem is provided, and a cooling fluid is sealed in the hollow hole. A receiving surface that gradually increases in diameter toward the center axis, and is greatly inclined toward the rear of the umbrella portion in the centrifugal direction with respect to the center axis, and from the outer peripheral edge of the receiving surface, toward the front in the centripetal direction. By providing a large number of saw-tooth-shaped uneven portions including a guide surface inclined at an inclination angle smaller than the inclination angle of the receiving surface, the cooling fluid sealed inside the hollow valve with the vertical movement of the hollow valve Is guided by the guide surface in the uneven portion, is reciprocated in the direction of the central axis, and collides with the receiving surface to be stirred.
傘部内の中空孔の内側面に、その前面に向って順次大
径となるとともに、弁の中心軸線に対して直交する受止
面と、この中心軸線と平行をなす案内面とからなる階段
状の多数の凹凸部、もしくは、前記中心軸線に対して大
きく傾斜する受止面と、緩傾斜の案内面とからなる鋸歯
状の多数の凹凸部を設けてあるので、傘部内における中
空孔の表面積が大きくなり、冷却用流体への熱の伝達量
が増大し、かつ内燃機関の作動時、中空弁が上下に往復
運動するのに伴い、傘部の中空孔内の冷却用流体が、前
記凹凸部における案内面により前記中心軸線の方向へ往
復させられるとともに、多数の前記受止面に当接して十
分に撹拌されるので、冷却用流体に対する伝達は良好に
行われ、中空弁の冷却性能は向上する。On the inner surface of the hollow hole in the umbrella part, the diameter gradually increases toward the front surface, and a step-like shape comprising a receiving surface orthogonal to the central axis of the valve and a guide surface parallel to this central axis A large number of irregularities, or a receiving surface that is largely inclined with respect to the central axis, and a large number of serrated irregularities composed of a gently inclined guide surface, so that the surface area of the hollow hole in the umbrella portion is provided. Increases, the amount of heat transferred to the cooling fluid increases, and when the internal combustion engine is operating, the hollow valve reciprocates up and down, so that the cooling fluid in the hollow hole of the umbrella section has the irregularities. The reciprocation in the direction of the central axis by the guide surface in the section and the abutment on a large number of the receiving surfaces are sufficiently stirred, so that the transmission to the cooling fluid is performed well, and the cooling performance of the hollow valve is improved. improves.
以下、本考案の実施例を、図面に基いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は、本考案の第１実施例を示す。 FIG. 1 shows a first embodiment of the present invention.
この中空弁は、傘部（１）とステム（２）を連設した
弁の中心軸線（Ｘ−Ｘ）に沿って、傘部（１）から、ス
テム（２）の上端部に設けたコッタ（図示略）係止用の
環状凹溝（３）の近くに至る中空孔（４）を穿設したも
のである。The hollow valve includes a cotter provided at the upper end of the stem (2) from the umbrella (1) along the central axis (XX) of the valve having the umbrella (1) and the stem (2) connected to each other. (Not shown) A hollow hole (4) reaching the vicinity of the annular groove (3) for locking is formed.
中空孔（４）は、前記中心軸線（Ｘ−Ｘ）と同軸をな
してステム（２）内に位置する一定の径の小径孔（4a）
と、同じく中心軸線（Ｘ−Ｘ）と同軸をなして、傘部
（１）の前面（1a）に向かって漸次拡径する大径孔（4
b）とからなり、傘部（１）の前面（1a）側より穿設さ
れている。The hollow hole (4) is a small-diameter hole (4a) having a fixed diameter and located in the stem (2) coaxially with the central axis (XX).
And a large-diameter hole (4) which is also coaxial with the central axis (XX) and gradually expands in diameter toward the front surface (1a) of the umbrella (1).
b), and is formed from the front (1a) side of the umbrella (1).
大径孔（4b）の内側面には、明瞭に図示してあるよう
に、傘部（１）の前面（1a）に向って順次大径となると
ともに、前記中心軸線（Ｘ−Ｘ）に対して直交する水平
の受止面（5a）と、この受止面（5a）の外周縁（5b）か
ら、前記中心軸線（Ｘ−Ｘ）の方向に延びる案内面（5
c）とからなる階段状の多数の凹凸部が形成されてい
る。On the inner surface of the large-diameter hole (4b), as clearly shown, the diameter gradually increases toward the front surface (1a) of the umbrella portion (1) and the central axis (XX) A guide surface (5a) extending in the direction of the central axis (XX) from a horizontal receiving surface (5a) orthogonal to the outer surface and an outer peripheral edge (5b) of the receiving surface (5a).
c), a large number of step-like uneven portions composed of the following are formed.
中空孔（４）内には、冷却用流体である金属ナトリウ
ム（６）が、弁作動時において、中空孔（４）内を自由
に躍動飛散しうる程度の空隙（７）を残して封入されて
いる。In the hollow hole (4), metallic sodium (6), which is a cooling fluid, is sealed while leaving a gap (7) that can freely scatter inside the hollow hole (4) when the valve is operated. ing.
（８）は、傘部（１）の前面における中空孔（４）穿
設用の開口部（1b）を閉塞する閉塞板で、金属ナトリウ
ム（６）を封入したのち、摩擦圧接等によって固着され
ている。(8) is a closing plate for closing the opening (1b) for drilling the hollow hole (4) in the front of the umbrella portion (1), and after sealing the metallic sodium (6), it is fixed by friction welding or the like. ing.
第１実施例の中空弁においては、高熱となる傘部
（１）側の大径孔（4b）に、弁の中心軸線（Ｘ−Ｘ）に
対して直交する水平の受止面（5a）と、受止面（5a）の
外周縁（5c）から前記中心軸線（Ｘ−Ｘ）の方向に延び
る案内面（5b）とからなる階段状の多数の凹凸部を形成
してあるから、金属ナトリウム（６）との接触面積が大
であり、かつ金属ナトリウム（６）は、中空弁の運動に
伴い、案内面（5c）に案内されて、前記中心軸線（Ｘ−
Ｘ）の方向に往復運動させられるとともに、受止面（5
a）に衝突して強く撹拌される。In the hollow valve of the first embodiment, the large diameter hole (4b) on the side of the umbrella portion (1) where heat is generated has a horizontal receiving surface (5a) perpendicular to the central axis (XX) of the valve. And a guide surface (5b) extending in the direction of the central axis (XX) from the outer peripheral edge (5c) of the receiving surface (5a). The contact area with the sodium (6) is large, and the metallic sodium (6) is guided by the guide surface (5c) with the movement of the hollow valve, and the central axis (X-
X) and the receiving surface (5
It is strongly stirred by colliding with a).
従って、傘部（１）における熱は、金属ナトリウム
（６）に効率良く伝達されるとともに、金属ナトリウム
（６）を介して、ステム（２）側に速やかに伝達され
る。Therefore, the heat in the umbrella portion (1) is efficiently transmitted to the metallic sodium (6), and is quickly transmitted to the stem (2) via the metallic sodium (6).
第２図は、本考案の第２実施例を示す。 FIG. 2 shows a second embodiment of the present invention.
この中空弁も、ステム（11）とその前方の傘部（12）
に、それぞれ弁の中心軸線（Ｘ−Ｘ）と同軸をなす一定
の径の小径孔（13）と、傘部（12）の前面に向かって漸
次大径となる大径孔（14）とが設けられており、それに
適量の金属ナトリウム（15）を封入して、閉塞板（16）
で閉塞してあることは、第１実施例と同様である。This hollow valve also has a stem (11) and an umbrella (12) in front of it.
A small-diameter hole (13) having a constant diameter coaxial with the central axis (XX) of the valve and a large-diameter hole (14) gradually increasing in diameter toward the front surface of the umbrella (12). It is provided with an appropriate amount of metallic sodium (15), and the obturator plate (16)
Is the same as in the first embodiment.
しかして、大径孔（14）の内周面は、前記中心軸線
（Ｘ−Ｘ）に対して、遠心方向に後方へ向かって比較的
大きな角度（α）をもって傾斜する受止面（17）と、こ
の受止面（17）の外周縁（18）から、受止面（17）の傾
斜角度（α）よりも小さな傾斜角度（β）をもって、求
心方向に前方へ向かって傾斜する案内面（19）とからな
る、多数の鋸歯状の凹凸部となっている。The inner peripheral surface of the large-diameter hole (14) has a receiving surface (17) inclined at a relatively large angle (α) in the centrifugal direction rearward with respect to the central axis (XX). And a guide surface inclined forward from the outer peripheral edge (18) of the receiving surface (17) in the centripetal direction at an inclination angle (β) smaller than the inclination angle (α) of the receiving surface (17). (19), a large number of serrated irregularities.
第２実施例によると、中空弁の前後運動に伴い、中空
孔に封入されている金属ナトリウム（15）は、案内面
（19）により案内されて遠心方向に導かれた後、受止面
（17）との接合部である外周縁（18）を経て、求心方向
に偏向させられるとともに、前記中心軸線（Ｘ−Ｘ）の
方向へやや前方へ偏向された上、中心軸線の方向へ移動
させられて、効果的に攪拌され、冷却される。According to the second embodiment, as the hollow valve moves back and forth, the metallic sodium (15) sealed in the hollow hole is guided by the guide surface (19) and guided in the centrifugal direction. After being deflected in the centripetal direction through an outer peripheral edge (18) which is a joint with the above 17), the light is deflected slightly forward in the direction of the central axis (XX), and then moved in the direction of the central axis. And effectively stirred and cooled.
傘部に形成した中空孔の内面に、弁の中心軸線に対し
て直交する受止面と、その外周縁から、前記中心軸線と
平行をなす案内面とからなる、多数の凹凸部、もしく
は、前記中心軸線に対して大きく傾斜する受止面と緩傾
斜の案内面とからなる多数の鋸歯状の凹凸部を設けると
いう簡単な構成により、冷却用流体を効果的に撹拌させ
るとともに、その中空弁に対する接触面積を大としてあ
るから、傘部よりの冷却用流体への熱の伝達効率が高ま
り、弁作動時における傘部の熱負荷を著しく軽減させる
ことができる。On the inner surface of the hollow hole formed in the umbrella portion, a receiving surface orthogonal to the central axis of the valve, and from the outer peripheral edge, a guide surface parallel to the central axis, a number of uneven portions, or With a simple configuration in which a large number of saw-toothed irregularities formed of a receiving surface that is greatly inclined with respect to the central axis and a guide surface that is gently inclined, the cooling fluid is effectively stirred, and the hollow valve is provided. Since the contact area with the head is large, the efficiency of heat transfer from the head to the cooling fluid is increased, and the heat load on the head during valve operation can be significantly reduced.
第１図は、本考案の第１実施例の中空弁を示す中央縦断
正面図である。 第２図は、同じく第２実施例の中空弁を示す要部の縦断
正面図である。 （１）傘部 （1a）前面 （1b）開口部 （２）ステム （３）環状凹溝 （４）中空孔 （4a）小径孔 （4b）大径孔 （５）凹凸部 （5a）受止面 （5b）外周縁 （5c）案内面 （６）金属ナトリウム （７）空隙 （８）閉塞板 （11）ステム （12）傘部 （13）小径孔 （14）大径孔 （15）金属ナトリウム （16）閉塞板 （17）受止面 （18）外周縁 （19）案内面 （Ｘ−Ｘ）弁の中心軸線FIG. 1 is a central longitudinal sectional front view showing a hollow valve according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional front view of a main part showing the hollow valve of the second embodiment. (1) Umbrella (1a) Front (1b) Opening (2) Stem (3) Annular groove (4) Hollow hole (4a) Small diameter hole (4b) Large diameter hole (5) Uneven part (5a) Reception Surface (5b) Outer edge (5c) Guide surface (6) Metallic sodium (7) Void (8) Closure plate (11) Stem (12) Head (13) Small diameter hole (14) Large diameter hole (15) Metallic sodium (16) Closure plate (17) Receiving surface (18) Outer edge (19) Guide surface (XX) Center axis of valve
Claims (2)
って、傘部からステムの適所までに亘る中空孔を設け、
この中空孔内に、冷却用流体を封入してなる内燃機関用
中空弁において、 前記傘部内における中空孔の内側面に、傘部の前面に向
って順次大径となるとともに、前記中心軸線に対して直
角をなす受止面と、この受止面の外周縁から前記中心軸
線と平行に延びる案内面とからなる階段状の多数の凹凸
部を設けることにより、中空弁の上下運動に伴い、その
内部に封入されている冷却用流体が、前記凹凸部におけ
る案内面に案内されて、前記中心軸線の方向に往復運動
させられるとともに、前記受止面に衝突して撹拌される
ようにしたことを特徴とする内燃機関用中空弁。1. A hollow hole extending from an umbrella portion to a proper position of a stem is provided along a central axis of a valve having an umbrella portion and a stem connected to each other,
In the hollow valve for an internal combustion engine in which a cooling fluid is sealed in the hollow hole, the inner surface of the hollow hole in the umbrella portion has a diameter gradually increasing toward the front surface of the umbrella portion, and the center axis is By providing a large number of steps in the form of a receiving surface perpendicular to the receiving surface and a guide surface extending in parallel with the central axis from the outer peripheral edge of the receiving surface, with the vertical movement of the hollow valve, The cooling fluid enclosed therein is guided by the guide surface in the uneven portion, reciprocated in the direction of the central axis, and collides with the receiving surface to be stirred. A hollow valve for an internal combustion engine, comprising:
って、傘部からステムの適所までに亘る中空孔を設け、
その中空孔内に、冷却用流体を封入してなる内燃機関用
中空弁において、 前記傘部内における中空孔の内側面に、傘部の前面に向
って順次大径となるとともに、前記中心軸線に対して遠
心方向に傘部の後部へ向って大きく傾斜する受止面と、
この受止面の外周縁から、求心方向に前方へ向って、受
止面の傾斜角度よりも小さな傾斜角度で傾斜する案内面
とからなる鋸歯状の多数の凹凸部を設けることにより、
中空弁の上下運動に伴い、その内部に封入されている冷
却用流体が、前記凹凸部における案内面に案内されて、
前記中心軸線の方向に往復運動させられるとともに、前
記受止面に衝突して撹拌されるようにしたことを特徴と
する内燃機関用中空弁。2. A hollow hole extending from the umbrella portion to an appropriate position of the stem is provided along a central axis of a valve provided with the umbrella portion and the stem,
In the hollow valve for an internal combustion engine, in which a cooling fluid is sealed in the hollow hole, the inner surface of the hollow hole in the umbrella portion has a diameter gradually increasing toward the front surface of the umbrella portion, and the center axis is On the other hand, a receiving surface that is greatly inclined toward the rear of the umbrella in the centrifugal direction,
From the outer peripheral edge of the receiving surface, toward the front in the centripetal direction, by providing a large number of saw-tooth-shaped uneven portions consisting of a guide surface inclined at an inclination angle smaller than the inclination angle of the receiving surface,
With the vertical movement of the hollow valve, the cooling fluid sealed therein is guided by the guide surface in the uneven portion,
A hollow valve for an internal combustion engine, wherein the hollow valve is reciprocated in the direction of the central axis and collides with the receiving surface to be stirred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990120341U JP2547383Y2 (en) | 1990-11-19 | 1990-11-19 | Hollow valves for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990120341U JP2547383Y2 (en) | 1990-11-19 | 1990-11-19 | Hollow valves for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0476907U JPH0476907U (en) | 1992-07-06 |
| JP2547383Y2 true JP2547383Y2 (en) | 1997-09-10 |
Family
ID=31868252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990120341U Expired - Lifetime JP2547383Y2 (en) | 1990-11-19 | 1990-11-19 | Hollow valves for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2547383Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015127521A (en) * | 2013-12-27 | 2015-07-09 | 日本ピストンリング株式会社 | Combination of valve and valve seat for internal combustion engine |
| WO2015170384A1 (en) * | 2014-05-08 | 2015-11-12 | 日鍛バルブ株式会社 | Hollow poppet valve |
| KR101674659B1 (en) | 2012-10-02 | 2016-11-09 | 니탄 밸브 가부시키가이샤 | Hollow poppet valve |
| KR20190138894A (en) * | 2018-03-20 | 2019-12-16 | 니탄 밸브 가부시키가이샤 | Exhaust Hollow Poppet Valve |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006226127A (en) * | 2005-02-15 | 2006-08-31 | Sanden Corp | Electric compressor |
| WO2014054613A1 (en) * | 2012-10-02 | 2014-04-10 | 日鍛バルブ株式会社 | Hollow poppet valve |
| PL2975229T3 (en) | 2013-03-14 | 2021-05-17 | Nittan Valve Co., Ltd. | Hollow poppet valve |
| WO2014147759A1 (en) * | 2013-03-19 | 2014-09-25 | 日鍛バルブ株式会社 | Hollow poppet valve |
| KR101688582B1 (en) * | 2013-04-11 | 2016-12-21 | 니탄 밸브 가부시키가이샤 | Hollow poppet valve |
| JP7190506B2 (en) * | 2018-11-12 | 2022-12-15 | 株式会社Nittan | Manufacturing method of engine poppet valve |
| WO2021199190A1 (en) | 2020-03-30 | 2021-10-07 | 日鍛バルブ株式会社 | Method for manufacturing engine poppet valve |
| JPWO2022195730A1 (en) * | 2021-03-16 | 2022-09-22 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59108811A (en) * | 1982-12-14 | 1984-06-23 | Ishikawajima Harima Heavy Ind Co Ltd | Exhaust valve device of internal-combustion engine |
| JPS62102806U (en) * | 1985-12-18 | 1987-06-30 |
-
1990
- 1990-11-19 JP JP1990120341U patent/JP2547383Y2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101674659B1 (en) | 2012-10-02 | 2016-11-09 | 니탄 밸브 가부시키가이샤 | Hollow poppet valve |
| JP2015127521A (en) * | 2013-12-27 | 2015-07-09 | 日本ピストンリング株式会社 | Combination of valve and valve seat for internal combustion engine |
| WO2015170384A1 (en) * | 2014-05-08 | 2015-11-12 | 日鍛バルブ株式会社 | Hollow poppet valve |
| KR20190138894A (en) * | 2018-03-20 | 2019-12-16 | 니탄 밸브 가부시키가이샤 | Exhaust Hollow Poppet Valve |
| KR102285017B1 (en) * | 2018-03-20 | 2021-08-04 | 니탄 밸브 가부시키가이샤 | Hollow Poppet Valve for Exhaust |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0476907U (en) | 1992-07-06 |
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